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The ρ′ in the reaction γp→ π+π−π0π0 p at photon energies of 20–70 GeV

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Zeitschrift für Physik C Particles and Fields

Abstract

The reactionγp→π + π − π 0 π 0 p (excludingωπ 0 production) has been studied for photon energies in the range 20–70 GeV. A peak is seen in the 4π mass spectrum at ∼1.66 GeV with a width of ∼0.3 GeV which is identified with theρ′(1600). Maximum likelihood fits show that the peak is dominantly inρ ± π ∓ π 0 withB(ρ′→ρ 0 π 0 π 0)/B(ρ′→ρ ± π ∓ π 0)<0.1. This indicates anI=1ρπ final-state interaction. However, no evidence is found for any resonant ρπ state such as anA 1 orπ′.

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Authors and Affiliations

  1. Physikalisches Institut der Universität, D-5300, Bonn, Germany

    B. Diekmann, K. Heinloth, H. -P. Jakob, M. Jung, V. Liebenau, E. Paul, M. Reidenbach, H. Rotscheidt & A. Schlösser

  2. CERN, CH-1211, Geneva 23, Switzerland

    J. -C. Lassalle, G. N. Patrick & K. M. Storr

  3. University of Glasgow, G12 8QQ, Glasgow, UK

    P. J. Bussey, J. B. Dainton, C. Paterson, C. Raine, I. O. Skillicorn & K. M. Smith

  4. University of Lancaster, LA1 4YB, Lancaster, UK

    T. J. Brodbeck, A. B. Clegg, P. J. Flynn, R. C. W. Henderson & D. Newton

  5. University of Manchester, M13 9PL, Manchester, UK

    T. J. Axon, D. Barberis, B. Dickinson, A. Donnachie, R. J. Ellison, R. E. Hughes-Jones, M. Ibbotson, G. D. Lafferty, J. B. Lane, D. Mercer, R. J. Thompson, A. P. Waite & M. F. Worsell

  6. Université Pierre et Marie Curie (Paris VI), F-75230, Paris, France

    J. Laberrigue, J. M. Levy, Ch. de la Vaissiere & T. P. Yiou

  7. Rutherford Appleton Laboratoires, Chilton, OX11 0QQ, Didcot, Oxon, UK

    M. Atkinson, M. Davenport, P. Flower, J. S. Hutton, B. R. Kumar, J. A. G. Morris, J. V. Morris & P. H. Sharp

  8. University of Sheffield, S3 7RH, Sheffield, UK

    G. R. Brookes, J. J. Bunn, W. Galbraith & R. H. McClatchey

Authors
  1. M. Atkinson
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  2. T. J. Axon
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  3. D. Barberis
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  12. B. Diekmann
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  14. R. J. Ellison
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  15. P. Flower
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  16. P. J. Flynn
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  17. W. Galbraith
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  18. K. Heinloth
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  19. R. C. W. Henderson
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  20. R. E. Hughes-Jones
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  21. J. S. Hutton
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  22. M. Ibbotson
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  23. H. -P. Jakob
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  24. M. Jung
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  26. J. Laberrigue
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  27. G. D. Lafferty
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  28. J. B. Lane
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  29. J. -C. Lassalle
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  32. R. H. McClatchey
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  34. J. A. G. Morris
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  35. J. V. Morris
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  36. D. Newton
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  37. C. Paterson
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  38. G. N. Patrick
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  39. E. Paul
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  40. C. Raine
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  41. M. Reidenbach
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  42. H. Rotscheidt
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  43. A. Schlösser
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  44. P. H. Sharp
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  45. I. O. Skillicorn
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  51. M. F. Worsell
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  52. T. P. Yiou
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Omega Photon Collaboration., Atkinson, M., Axon, T.J. et al. The ρ′ in the reaction γp→ π+π−π0π0 p at photon energies of 20–70 GeV. Z. Phys. C - Particles and Fields 26, 499–506 (1985). https://doi.org/10.1007/BF01551791

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  • DOI: https://doi.org/10.1007/BF01551791

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